Ext.define('Holo.store.Contenus', {
    extend: 'Ext.data.Store',
    requires: 'Holo.model.Contenu',
    model: 'Holo.model.Contenu',
    sorters: 'type',
    getGroupString : function(record) {
        return record.get('type');
    },
    autoLoad: true
});